底部近距离爆炸下舱段模型毁伤试验研究

底部近距离爆炸可对水面舰船造成致命性打击，为探究其破坏机理，本文中开展了底部近距离爆炸下舱段模型的毁伤试验，获取了舱段模型破损区域试验数据、非破损区域的冲击环境数据。同时借助舷侧近距离爆炸试验结果、底部中远场爆炸试验结果，综合对比可发现:（1）底部近距离爆炸下，舱段模型会呈现整体隆起变形、爆心区域撕裂并伴有较大凹陷变形、舷侧外板大面积屈曲失稳等典型特征；（2）相比舷侧爆炸方位，底部爆炸对舱段模型具有很强的综合毁伤效果，底部爆炸相对舷侧爆炸对舱段模型的综合毁伤效果可提高40%以上；（3）在冲击环境方面，底部近距离爆炸下非破损区域测点中高频段的冲击谱曲线变化趋势基本与中远场爆炸一致，但在低频阶段，底部近距离爆炸下的谱位移要远高于中远场爆炸工况。

Damaging characteristics of a cabin model under close-in underwater explosion from bottom attacting

Experiment of cabin model subjected to close-in underwater explosion from bottom attacting was investigated to explore the damage failure model of warship, The demolishing region datas of cabin model together with shock environment information were obtained. Furthermore, by contrasting the experimental results from the case of close-in underwater explosion from ship broadside attacting and far-mild field shock environment trial. It is concluded that: (1) the typical failure of cabin model mainly contains the whole deformation, tearing in the middle along with local dish on both sides; (2) the bottom attacting method has more destruction ability in contrast to the ship broadside attacting way, it is found more than 40% damage effect can be increased according to the experimental results; (3) the variation tendency of measuring point shock spectra between close-in and far-mild field bottom underwater explosion at middle and high frequency level, Unfortunately, for the low frequency level the values of close-in underwater explosion are greater than the latter.